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Javascript method to convert array to string: 1. Use toString() method, syntax "arrayObject.toString()"; 2. Use join() method, syntax format "arrayObject.join(separator) )".
The operating environment of this tutorial: windows7 system, javascript version 1.8.5, Dell G3 computer.
Method 1. Use toString()
toString() method can convert the array into a string and return the result.
Syntax
arrayObject.toString()
Return value
String representation of arrayObject. The return value is the same as the string returned by the join() method without parameters.
Example
<script type="text/javascript"> var arr = new Array(3) arr[0] = "George" arr[1] = "John" arr[2] = "Thomas" document.write(arr.toString()) </script>
Output:
George,John,Thomas
Method 2, use join()
The join() method is used to put all elements in the array into a string.
Elements are separated by the specified delimiter.
Syntax
arrayObject.join(separator)
Parameters | Description |
---|---|
separator | Optional. Specify the delimiter to use. If this parameter is omitted, a comma is used as the delimiter. |
Return value
Returns a string. The string is generated by converting each element of the arrayObject to a string and then concatenating the strings, inserting the separator string between the two elements.
Example
Example 1
In this example, we will create an array and put all its elements into a string:
<script type="text/javascript"> var arr = new Array(3) arr[0] = "George" arr[1] = "John" arr[2] = "Thomas" document.write(arr.join()) </script>
Output:
George,John,Thomas
Example 2
In this example, we will use delimiter to separate the elements in the array:
<script type="text/javascript"> var arr = new Array(3) arr[0] = "George" arr[1] = "John" arr[2] = "Thomas" document.write(arr.join(".")) </script>
Output:
George.John.Thomas
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